If my memory isn't playing tricks on me, I seem to recall reading fairly recently that some research had been done that shows that water has some sort of a memory effect.

I'd look for the information myself, but am busy at the moment...

Just thought I'd throw that out there...

...Ok, so I lied...here's a link that discusses this phenomena...I'm sure there's more info out there...

http://www.newscientist.com/article.ns?id=dn3817